Abstract: Electric field uniformity of import and export of electrical precipitator flow distribution is the main factor that affects the efficiency of electrostatic precipitators． On the bases of computational fluid dynamic( CFD) method，the airflow distribution of rectangular and cylindrical shape of electricity precipitator for converter gas were simulated using fluent software platform． Compared the difference between the gas flow distribution of two electrostatic precipitators，the study illustrated superiority of gas flow distribution in cylindrical electrostatic precipitator．